#283D71#283D71

#283D71 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.1% C 0.093 H 265.6°. Best body text is #FFFFFF at 10.52:1 contrast (WCAG AA passes).

Color values

HEX	#283D71
RGB	rgb(40, 61, 113)
HSL	hsl(223, 48%, 30%)
HSV	hsv(223, 65%, 44%)
CMYK	cmyk(64.6%, 46%, 0%, 55.7%)
CIE-LAB	lab(26.68, 9.71, -32.59)
CIE-LCH	lch(26.68, 34.00, 286.59°)
OKLab	oklab(37.13% -0.0072 -0.0929)
OKLCH	oklch(37.13% 0.093 265.6)
XYZ	xyz(5.5234, 4.9804, 16.2898)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D71 #715C28

analogous

#286171 #283D71 #382871

triadic

#283D71 #71283D #3D7128

tetradic

#283D71 #712861 #715C28 #287138

square

#283D71 #712861 #715C28 #287138

split-complementary

#283D71 #713828 #617128

monochromatic

#080C17 #182544 #283D71 #38559E #5272C2

Accessibility & contrast

On white

10.52

#283D71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#283D71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D71

10.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D71	#FFFFFF	#000000	##FFFFFF
##283D71	1.00	10.52	2.00	10.52
#FFFFFF	10.52	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254373

Deuteranopia (green-blind)

#1A3C70

Tritanopia (blue-blind)

#004951

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283d71;
/* rgb */ color: rgb(40, 61, 113);
/* oklch */ color: oklch(37.1% 0.093 265.6);

Tailwind

colors: {
  custom: {
    50: '#6a729a',
    500: '#283d71',
    950: '#000000',
  },
}

SCSS

$custom: #283d71;
$custom-light: #6a729a;
$custom-dark: #000000;

JSON

{
  "hex": "#283d71",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 113
  },
  "hsl": {
    "h": 222.74,
    "s": 47.712,
    "l": 30
  },
  "oklch": {
    "l": 0.37127,
    "c": 0.09321,
    "h": 265.6
  },
  "luminance": 0.04981
}

Semantic roles & 50–950 ramp

primary

#283D71

secondary

#A38C52

accent

#B150D7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283D71

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →